Very good points Flywatcher.
The sad thing is that it's getting more and more difficult to source fuel in Australia (probably elsewhere too).
Once, most townships had Aeroclubs who supplied fuel and a cup of coffee plus a chat.
With those going broke and fuel facilities being pulled out, it's hard enough to get fuel during the week in business hours.
On a weekend or out of hours which with daylight saving still constitutes 30% of the daylight hours, the humble jerrycan is becoming necessary again despite the caveats you've raised.